Thanks so much, Ardy (are you sure it was me, not you?!), Jo, Aishahm, Katie, Wendy, and Kathy! I have found that (after I create the mosaic tiles), adding first an embossing, which gives it that extra layer of color inside each piece, and then using soft lighting, to make it a little brighter, works for me. And I will see how big I can make this, for all us masochists! :-)))

There's a dancing white skeleton on the right side. Nearby by I see a leaping frog - light green. Just above the skeleton is a red faced cat. Pat, what was going through your mind here? LOL A real doozie of a puzzle. Thanks.